POSTED: Saturday, February 25, 2012 - 7:00pm
UPDATED: Saturday, February 25, 2012 - 7:04pm
NBC NEWS — A Brazilian fire department caught a helicopter disintegrating seconds after it landed.
First, strong vibrations, then the aircraft literally tore itself apart.
Investigators believe the cause is a phenomenon called ground resonance, it happens when the helicopter continues to turn while the aircraft is on the ground.
The four people in the helicopter were injured but were able to walk away from the aircraft.